orion_spi: handle 88F6183 erratum

From: Lennert Buytenhek <buytenh-OLH4Qvv75CYX/[email protected]>

The patch below adds support to orion_spi for the 88F6183 ARM SoC by adding code to work around a 6183-specific erratum.

---
this is for the 2.6.28-rc0 merge window ...

 drivers/spi/orion_spi.c       |    5 +++++
 include/linux/spi/orion_spi.h |    1 +
 2 files changed, 6 insertions(+)

@@ -364,6 +364,11 @@ static int orion_spi_setup(struct spi_de
 		return -EINVAL;
 	}
 
+	/* Fix ac timing if required.   */
+	if (orion_spi->spi_info->enable_clock_fix)
+		orion_spi_setbits(orion_spi, ORION_SPI_IF_CONFIG_REG,
+				  (1 << 14));
+
 	if (spi->bits_per_word == 0)
 		spi->bits_per_word = 8;
 

@@ -11,6 +11,7 @@
 
 struct orion_spi_info {
 	u32	tclk;		/* no <linux/clk.h> support yet */
+	u32	enable_clock_fix;
 };
 
 

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